16 lines
280 B
Awk
16 lines
280 B
Awk
# syntax: GAWK -f CATALAN_NUMBERS.AWK
|
|
BEGIN {
|
|
for (i=0; i<=15; i++) {
|
|
printf("%2d %10d\n",i,catalan(i))
|
|
}
|
|
exit(0)
|
|
}
|
|
function catalan(n, ans) {
|
|
if (n == 0) {
|
|
ans = 1
|
|
}
|
|
else {
|
|
ans = ((2*(2*n-1))/(n+1))*catalan(n-1)
|
|
}
|
|
return(ans)
|
|
}
|